Lachrymal canal, 244 Lactacidase, 125 Lactic acid bacteria, 97 fermentation, 96-99 LANCISI, 25, 33 LANDOIS, 271 LATOUR, 31, 34 LAVERAN, 25, 30 Lecithin as antigen, 279 as cell constituent, 84 as complement, 274 LEEUWENHOEK, 19, 32, 33 Legumes, 118 LEIDY, 27, 33, 34, 35 LE MOIGNAC, 284 Leprosy, 233, 244, 249 LESSER, 32 Lethal dose, 264 Leukocytes, washing of, 281 Lice as carriers, 241 LIEBERT, 28, 34 Light, action on bacteria, 75 as disinfectant, 148 production of, 111 LINNÆUS, 25 Lipase, 124 Lipochromes, 113 Lipoids as antigen, 274 Lipovaccines, 284 Liquefaction of gelatin, 221 of protein, 103 Liquid blood serum, 182 manure, disinfection of, 169 media, 172 Liquids, sterilization of, 153 LISTER, 29, 30, 35 Litmus milk, 177 Living bacteria, examination of, 201 cause theory, 28, 33 Localized infections, vaccines in, 286 Location of organisms, specificity of, 249 Lockjaw, 231, 233 Loeffler’s blood serum, 182 blue, 206 Loop needles, 193 Lophotrichic, 46 LÖSCH, 29, 35 Lungs, 245, 249 Lye washes as disinfectants, 159 Lymph channels in dissemination, 247 Lysol as disinfectant, 160 M MCCLINTOCK, 165 MCCOY, 160 Macrococcus, 52 Macroscopic agglutination, 265 Malaria, 25, 30, 32, 242 Malarial parasite, 30, 249 Malignant edema, 237, 243 Mallease reaction, 269 Mallein test, 292 Malta fever, 268 Mammary glands, 248 Mandler filter, 154 Manure, liquid, disinfection of, 169 heating of, 40 _Margaropus annulatus_, 242 MARTIN, 32 Mass cultures, 188 MASSART, 42 Maximum conditions, 72, 73, 74, 76 Measles, 246, 248, 250 German, 233, 239 Measly pork, 28 Measurement of bacteria, 203 special unit of, 40 Meat broth, 173 identification of, 269 juice, 173 poisoning, 104 Mechanical vibration, 80 Medico-legal examination, 269, 279, 293 Medium. _See_ Culture medium Meningitis, 239, 244 Meningococcus, 244 Mercuric chloride, 158 Merismopedia, 57 Metabiosis, 103 Metabolism, 86-91 Metachromatic granules, 44, 45, 59, 212 Metastases, 235 Metatrophic, 86 METCHNIKOFF, 256, 280 Methods of inoculation of animals, 227 of cultures, 186-188 of obtaining pure cultures, 194 Methylamine, 103 Methylene blue, 205, 206 Mice, white, 227 Microbiology, 231 Micrococcus, 52, 60, 62, 66, 68, 69, 245 Micrometer, 203 Micromillimeter, 40 Micron, 40 Microörganisms, 32 Microscope, improvements in, 30, 36 invention, 19 Leeuwenhoek’s, 19 use of, 200 Microspira, 61, 63 _Microsporon furfur_, 28, 34 Middle ear, 241 Migula’s classification, 62